231246240 has 144 divisors (see below), whose sum is σ = 774258912. Its totient is φ = 58003456.

The previous prime is 231246229. The next prime is 231246269. The reversal of 231246240 is 42642132.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 231246240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137887 + ... + 139553.

It is an arithmetic number, because the mean of its divisors is an integer number (5376798).

Almost surely, 2^231246240 is an apocalyptic number.

231246240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231246240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387129456).

231246240 is an abundant number, since it is smaller than the sum of its proper divisors (543012672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231246240 is a wasteful number, since it uses less digits than its factorization.

231246240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1694 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 231246240 is about 15206.7826972046. The cubic root of 231246240 is about 613.7971863899.

Adding to 231246240 its reverse (42642132), we get a palindrome (273888372).

The spelling of 231246240 in words is "two hundred thirty-one million, two hundred forty-six thousand, two hundred forty".